gardiner



0 O. GARDINER. OENTERIN-G AND SQUARING DEVICE.

Patented Dep. 4, 1866 w g nt @ffm.

IMPROVEMENT IN UENTERING AND SQUAEING DEVICES.

CHARLES O. GARDINER, 0F SPRINGFIELD, OHIO.

Letters Patent No. 60,169, dated'December 4, 1866. a i

SPE'GIFICA'I'ION.

TO ALL WHOMIT MAY CONCERN:

Be it known that I, C. O. GARDINER, of Springfield, in the county of Clark, and State of Ohio, have invented certain new and useful Improvements in Tools for Turning, &c. and I do hereby declarethat the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings,

making'part of this specification, and to the letters of reference marked thereon-dike letters indicating like parts, wherever they occur. To enable others skilled in the art to construct and use the invention, Iwill proceed to describe it.

My invention has'for its object, the centering and squaring of the ends of metal rods by means of boots specially adapted to that purpose. a E

Figure 1 is a top'plan view of the tools-in position ready for use.

Figure 2 is a longitudinal section of the centering and squaring tool; an

.Figure 3 is an end view of the same.

Figure 4 is an end view of the chuck for; holding the article to be operated upon.

In the manufacture of many kinds of articles, it is necessary to use and consequently to make a large number of metal rods or spindles of uniform length and size; all of which have also to be centred, preparatory to placing in the lathe for turning.

To accomplish these objects I first'provide itself-centering chuck, consisting of a hollow conical body, A, provided with three steel blades, b, inserted through longitudinal slots inits sides as shown in figs. 1 and 4; the blades protruding slightly from the inner face of the cap, A; This chuck is provided with ,a socket, B, for screwing it fast to the lathe. It will be seen that when a rod has its end inserted in the cavity of the body-A, it will at once assume a central-position therein, owing to the inclination of its inner surface, and the blades,- 6, will seize upon and hold the rod so as to cause it to revolve with the chuck. At the opposite end, securedto the tail block of the lathe, is mounted the centering and squaring tool. This tool consists of a circular bodyjc,

having a curved arm, E, projecting from oneside, as shown infigs, 1, 2, and 3. This body, 0, has a hole drilled through it longitudinally at thecentre as shownin. fig. 2, in" which is inserted the centre drill, c. This drill is centred perfectly by means of three conical pieces, a, which are inserted around it, in a. cavity formed-in the; front end of G, where they are held, pressed firmly upon the drill, e, by means of the hollow hut, O, which is screwed into the cavity at the front end of C, the hole the nut, 0, being made conical, and embracing the wedges or jaws, a, as shown clearly in fig. 2. A tubular stem, F, is inserted in the rear end of C, and is centred and secured by three conical or wedged-shaped pieces, n,-which areialso pressed in and held firmly in position by means of the cap, I), screwed on to the rear end of C, as shown in fig. 2. This stem, F, serves to secure the tool in proper position to the tail block of the lathe. The arm, E, after projecting a short distance from the body, 0, is extended beyond the front end of C, and parallel therewith, as shown in fig. 1. On the upper face of this arm, E, a groove is formed as shown in fig. 1, which groove is made wider below as shown in fig. 3. A

standard, G, is provided, having a head, m, fitted to slide in this groove as shown in fig. 3; and a horizontal mortise is made through the standard, of proper size to receive the chisel, H, which rests upon a ring, n dropped loosely over the standard, G,-and resting on the arm, E. "A screw, d, is inserted in theupper end of the standard, G, and extends down to and presses on the chisel, H, thus serving to hold the chiselfirmly in the standard, and at the'sanie time securingthe standard, G, firmly to'the arm, E. By loo'scnin g the screw, d,- thechisel may be adjusted as desired in the standard, and the standard itself also adjustcdbackward orforwardion the arm, E, as circumstances may require. It will be observed that the centre, e, is formed into drill at its point, so that as the rod revolves, it gradually drills its way into the end of the rod; and tlie chisel bein placed at right angles to the rod and having its 'end brought close up against the drill, will atthesam e time turn of the end of the rod perfectly true and fiat. As the chisel can be set. at any desired angle, it is obvious that it maybe made to cut the end of the rod tapering or convex, at will, if desired.

To use my improved tools, it' is only necessary to attach them to the lathe as described, insert the rods,

and finish one end; then turn them, andcomplete the other end in a similar manner. In order to centre the rod readily I use a crotch rest, the notch in which is made of the proper size to bring theend of the rod to the proper position in relation to the drill, e.

- Having thus described my invention, what I claim,-is-- 1. The chuck 0, provided with the conical sectional rings or wedges a, and nut O, for centering and holding the drill e, as shown and described. Y 2. The sectional rings 71, and cap D, in combination with the chuck C', and spindle F, arranged and '4 operating its shown and desci'ibed.

3. I clairn the groovednrm E, attached to the body 0, and provided with the standard G, for holding the chisel H, when arranged to operate in connection with the other parts, as set forth.

4. The hollow conical chuck A, in combination with the detachable blades or jaws b, all constructed end arranged as and for; the purpose set forth.

CHARLES O. GARDINER.

Signed in presence of GEO. ARTHUR, GEO. SPENCE- 

